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  1. #271
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    剛剛看到這個整合 Roon 和 HQPlayer Embedded 的方案:

    https://audiophilestyle.com/forums/topic/19715-hq-player/page/786/?tab=comments#comment-1105758
    Here's how to get HQP OS/HQP Embedded running with Roon. This will require at least 2 computers: 1 for Roon and another for HQP Embedded. You can try it out without making any changes to your current server.

    • Download the HQP OS/HQP Embedded image file https://www.signalyst.eu/bins/hqplayerd/images
    • Download an HQP NAA image file if you're going to use an NAA (which I recommend): https://www.signalyst.eu/bins/naa/images/
    • Write the image(s) to a USB drive using this utility: https://sourceforge.net/projects/win32diskimager/
    • Set your server's BIOS to boot from the USB drive(s)
    • The server(s) should be available on your network with the names "hqplayer" and "naa"
    • From a command prompt on another computer on the network, ping both machines: "ping naa -4" and "ping hqplayer -4". This will confirm that both servers are running and available and will give you the local IP address for the hqplayer machine.
    • In Roon, go to Settings | Setup | Add HQPlayer and enter the HQP server's IP address. This will make the HQP Embedded server available as a new Roon zone.
    • In Roon, go to Settings | Audio and scroll to the HQPlayer section. Give the new zone a name.
    • From any web browser on the network, enter "hqplayer" in the address bar to configure HQP Embedded. The web interface is straightforward and all of the options should be familiar if you've used HQP Desktop. The "Settings" are in a link called "Configuration".
    • If you're using an NAA, connect the DAC directly and get that running first and then switch to the NAA.
    • If you would like to monitor the resource usage on the HQP server (similar to Task Manager in Windows), just type "root" at the login prompt and then enter the command "htop".

    Once the setup is complete, there's no need to interact with the servers directly. You control the music with Roon and the HQP settings from a web browser.


    這個 Taiko Audio Server 的軟件就是基於 LMS 的,然後獨自編寫另一 ExtremeDirect Player 來取代 Squeezelite 的功能,目標是逐漸取代聲音方面並不理想的 Roon:

    https://www.whatsbestforum.com/threa...86#post-700321
    I had TAS installed this morning and to be honest, I was a little nervous. TAS not sounding good was the least of my worries. In fact, my concern was what if TAS sounded too good not to use, but then the user interface sucked, like HQplayer, and missed the most basic functionally that was provided by my beloved Roon.

    Well I am happy to report that I have finally closed the door on Roon, thanks to TAS. Haven’t tested streaming yet, but for playing locally stored music, the interface is very slick. Super responsive and fast. No crashes. Multiple ways to browse your collection and full ability to manipulate the queue in any manner you please.
    TAS with the TAS driver was truly a revelation in my system

    you’re correct in saying that Roon is a thing of the past. I haven’t used it since November
    https://audiophilestyle.com/forums/t...omment-1104743

    Roon does not just serve the URL to an external program. It does a lot more than that that deteriorates the sound quality no matter where you run it or how you isolate it.

    Your idea to have Roon just handle the URL and shutdown any other activity is great. Unfortunately Roon has no desire to make such changes... or any changes that significantly improve the SQ. They have different priorities. Many of us have tried to convince them to do things to improve the sound quality but they have been ignorant and arrogant for the most part. That's their loss. New and much better software is coming up and replacing Roon in many high-end systems. The interface will slowly catch up over time.
    TAS is the leading one but not available yet.

    Euphony / Stylus.

    HQP sounds much better than Roon eden if you don't upsample.
    https://audiophilestyle.com/forums/t...omment-1105181
    You configure it to use more resources and you get lower latency, but that comes with some side effects (i.e. your server becomes even more sensitive to any extra network traffic, thus making the network chatty Roon even worse).
    Going back to the question about Roon. Roon does a lot of things that harm the sound quality. It performs constant network activity while you are playing, it has constant disk I/O activity, it does some processing that swings the CPU utilization, which causes noise that is audible in a resolving system. And the list goes on... Depending on whether you use a two box (a server and a streamer) solution or a single box solution like me it has different impact. But in any case, it would not be my choice for critical listening. Having said that Roon/Qobuz is the best tool for discovering new music for me. I so use it for that.


    要得到 TAS 的先決條件就是 Windows 10 LTSC 2019 與及華碩 WS C621E SAGE 主機板,另外他們亦有獨自開發 remote control apps:

    https://www.whatsbestforum.com/threa...35#post-667398


    除了 TAS 和 XD Player 之外,他們還優化了 XMOS 晶片專用的 USB audio driver,另外華碩主機板內置的 ASMedia ASM3142 亦被他們修改了 USB 控制晶片的 firmware:

    https://www.whatsbestforum.com/threa...84#post-699764



    其實 RPi Compute Module 4 的 PCIe slot 也可以安裝 ASMedia 的 USB Type-C 擴充卡,利用這軟件修改 firmware 後就可以連接另一台 RPi4 的 OTG 了:

    https://github.com/cyrozap/asmedia-xhc-re

    UAC2 gadget 的 USB audio driver 也可以像 XMOS 那樣得到優化,稍後 Xenomai 那邊把 ARM64 版本的 ipipe 更新到 Kernel 5 就可以試試 USB 音效卡的穩定度。



    https://www.signalyst.com/index.html
    New HQPlayer Embedded published.
    Now provides standard MPRIS control API that can be used with Rygel UPnP server to implement UPnP Renderer.
    雖然無法優化 Roon 和 HQPlayer Embedded,但是後者早已包括的 Rygel 就沒有問題了:

    https://github.com/GNOME/rygel
    https://gitlab.gnome.org/GNOME/rygel
    http://forum.tinycorelinux.net/index...html#msg152435

    當然也可以像 soundcheck 兄那樣精簡 LMS 和 Squeezelite,普通的 LMS 明顯是比 HQPlayer 的聲音遜色,可是前者明顯屬於一種『不省油的燈』,功能十分強大的代價就是令聲音方面打了折扣:

    https://soundcheck-audio.blogspot.co...ks-system.html
    • custom RPi OS 64
    • custom 64-bit RPi foundation kernel
    • custom 64-bit userspace
    • custom LogitechMediaServer 8.x (build from sources)
    • advanced tuning measures


    Linux 比 Windows 佔優的地方還有 Netmap 和 Audio over Ether 這種獨特的好處:

    http://www.ne.jp/asahi/gonzaemon/audio/diary51-04.html
    何にしてもかってない程納得の音。重心の低さと厚みの上に優雅で繊細な弦が乱舞する。広がりを維持しつつその震えが分かるほどに煌めく金管の咆哮。空気を切り裂いて凛と沁み通っていくトライアングル。演奏空間の透徹さ自然さは比類が無い。

    大言壮語なのか気の迷いか、錯覚か。茫洋としてその答えは定かではない。だが、ここで聴ける音楽は幻ではなく現実でもある。オーディオファイルとして待ち望んだ見果てぬ夢のほんの僅かな一瞬なのかもしれないが、、、
    (小弟的日語能力有限,如果 tetsuka 兄能夠解釋一下文章的大意就好了,謝謝。)



    実は他にもリポジトリへのアクセスを希望されているかたがいらっしゃいまして、リポジトリへのアクセス権を見直そうと思っています。
    Azure DevOpsの無料枠が5名までで、そこからは1名追加につき月額670円がかかります。できれば無料枠の範囲で運用したいなと思っています。

    ______さんと________さんにはこれまで通りのアカウントをご利用いただき、メンテナ用に1つ共有アカウトを用意しようと思います。
    Source code 方面需要跟其他網友共享同一 Azure DevOps Services 帳號:

    https://azure.microsoft.com/en-us/pr...vops-services/
    First 5 users free,
    then $6 per user per month
    假如能夠邀請 soundcheck 兄一起研發 AoE 的話該是很完美的說。

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  3. #272
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  5. #273
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    引用 作者: seeteeyou 查看文章
    除了 TAS 和 XD Player 之外,他們還優化了 XMOS 晶片專用的 USB audio driver,另外華碩主機板內置的 ASMedia ASM3142 亦被他們修改了 USB 控制晶片的 firmware:

    https://www.whatsbestforum.com/threa...84#post-699764



    其實 RPi Compute Module 4 的 PCIe slot 也可以安裝 ASMedia 的 USB Type-C 擴充卡,利用這軟件修改 firmware 後就可以連接另一台 RPi4 的 OTG 了:

    https://github.com/cyrozap/asmedia-xhc-re

    UAC2 gadget 的 USB audio driver 也可以像 XMOS 那樣得到優化,稍後 Xenomai 那邊把 ARM64 版本的 ipipe 更新到 Kernel 5 就可以試試 USB 音效卡的穩定度。


    請問他們優化的XMOS晶片driver是指XMOS提供的driver還是Windows10 LTSC原生的UAC 2 Driver?

    UAC2 gadget 的 USB audio driver 是指樹梅派系統用的driver嗎?

    另外請問他們優化driver的方向是?

    https://www.whatsbestforum.com/threa...84#post-699764

    看了幾頁沒找到相關介紹

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  7. #274
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    Higuma 兄您好,
    引用 作者: Higuma 查看文章
    請問他們優化的XMOS晶片driver是指XMOS提供的driver還是Windows10 LTSC原生的UAC 2 Driver?
    基本上就是 Thesycon 與 XMOS 雙方提供的(3rd-party)ASIO driver,理論上 Windows 10 和 Server 2019 等等的平台也合用,因此相當肯定不會是 UAC 2 那種只可以支援 WASAPI 的 in-box USB Audio 2.0 driver:

    https://www.thesycon.de/eng/usb_audiodriver.shtml
    https://www.xmos.ai/software/usb-audio/driver-support/
    Production (Thesycon Driver)






    畢竟原生的 usbaudio2.sys 大概是沒有提供甚麼選項的說。



    引用 作者: Higuma 查看文章
    UAC2 gadget 的 USB audio driver 是指樹梅派系統用的driver嗎?
    對了,實際上的功用就是令樹莓派變成另一台 PC/樹莓派的 USB 音效卡,如果要優化 USB audio driver 的話大概是需要修改一些 source code:

    https://github.com/torvalds/linux/bl...ux/usb/audio.h
    https://github.com/torvalds/linux/tr...adget/function

    早於 2015 年,當時的樹莓派 Zero 也支援 OTG 了:

    https://gist.github.com/gbaman/50b6cca61dd1c3f88f41

    另外 IanCanada 的 ReceiverPi 和 HiFiBerry 的 Digi+ I/O 也可以令樹莓派變成其他介面的音效卡:

    https://www.hifiberry.com/shop/board...berry-digi-io/

    HiFiBerry 的 Alsaloop:

    https://github.com/hifiberry/alsaloop
    https://pypi.org/project/pyalsaaudio/
    https://github.com/larsimmisch/pyalsaaudio
    https://sourceforge.net/projects/pyalsaaudio/
    http://tinycorelinux.net/4.x/x86/tcz...audio.tcz.info



    引用 作者: Higuma 查看文章
    另外請問他們優化driver的方向是?

    https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-284#post-699764

    看了幾頁沒找到相關介紹
    這個就比較難猜測,小弟聽說 ASIO driver 和 TAS 等等軟件好像是由荷蘭當地的一位台灣人 Edward Hsu 和他一眾隊友共同開發的,但是據稱那 Thesycon/XMOS ASIO driver 只能夠配合 TAS 一起使用才能發揮應有的水準云云,創辦 WBF 論壇的 Steve Williams 把他的 DAC 送回 Lampizator 原廠那邊升級,他們把原有的 Amanero USB 介面更換為相對新款的 XMOS XU-208:

    http://jlsounds.com/i2soverusb.html

    後來廠商剛剛把 DAC 送回給他,初時 Windows 10 LTSC 尚未安裝那個客製的 ASIO driver,因此硬件升級後也好像是顯得沒有甚麼分別,可是 Taiko Audio 的老闆 Emile Bok 完成了客製 ASIO driver 和 TAS 測試版兩者的安裝之後就令他大喊 WTF 了:

    https://www.whatsbestforum.com/threa...78#post-697305

    https://www.whatsbestforum.com/threa...78#post-697594

    那一位老闆於 2008 的時候已經開始鑽研 CAT 了:

    https://www.whatsbestforum.com/threa...79#post-698138



    人外有人,天外有天,當然這個世界就是一山還有一山高,不論 Taiko Audio 如何窮一生的精力去優化各種軟件和硬件也只能夠受制於 x86 這種平台的(先天性)短板,理論上是十分難/不可能超越西班牙 WADAX 最新的旗艦產品:

    https://audiophilestyle.com/forums/t...omment-1104250


    比『變態級』更變態的光纖線:

    https://www.facebook.com/panagiotis....55084167934405


    就算是再強的 Xeon CPUs 配上功力多麼深厚的 Windows/Linux 程序猿,技術上也不會那麼容易超越 WADAX 研發的那一種 ASICs(Application Specific Integrated Circuits)。

    前者純屬一般的 general-purpose operating systems,根本上就不可以跟後者同日而語:

    https://www.whatsbestforum.com/threa...-2#post-689210
    I hear that Wadax Reference Server does not depend on computer industry soft and hardware. It still use Roon but will be enhanced with their custom extensions. The most important is that it will use the proprietary connection interface which is only compatible with their Reference DAC.


    畢竟 WADAX 的僱員數目大約為 400 名,Atlantis Reference DAC 的售價已經逼近十五萬鎂,加上旗艦 Atlantis Reference Server 的一套系統應該是差不多三十萬鎂了,不知道僅僅 CAT + DAC 就超過八百萬的聲音將會是甚麼景況呢?



    那種『可怕』的系統能夠瞞天過海,播放 TIDAL 數位串流音樂的時候足以令所有在場的發燒友受騙了,誤以為當時播放了大約三十分鐘的聲音是來自黑膠唱片:

    https://audioexotics.vanillacommunit...#Comment_17665

    器材一覽:

    https://www.audioexotics.com/studio/divin-lab/

    音響技術執行主編(大草哥)每年也會舉辦大型的香港高級視聽展,經驗如此豐富的他還是被推坑了:

    https://audioexotics.vanillacommunit...#Comment_17452
    https://www.audioexotics.com/product...reference_dac/
    The biggest shock comes from Lincoln Cheng of Audiotechnique. Lincoln, who is a big fan of Audio Note UK decided to sell the ANUK flagship CD/DAC system in exchange for the Wadax Atlantis Reference DAC/Transport. He even had to modify his rack in order to house the big Wadax DAC. Why would he go through such hassles under a COVID environment?
    原有的 CDT Six 和 The Fifth Element(九萬六千英鎊 + 九萬六千英鎊)兩者實屬異次元的東西,再加上整套 Siltech Triple Crown 的線材就不知道怎麼形容了,然而 WADAX 實在是魅力沒法擋,看過這些 Audio Note 的評測後就可以猜想 WADAX 到底有多可怕了:

    https://d1b89e86-9572-4311-9f80-6000...ffa4c859dc.pdf
    https://elephant.com.hk/audio-note-c...ent-decoder-2/ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
    https://elephant.com.hk/audio-note-c...ement-decoder/ 1 2 3 4 5 6 7 8 9 10 11 12
    https://www.review33.com/news/news.p...20160408135416
    呢套野好似已經出左成年,據我一位賣緊極高級黑膠盤的朋友講,佢係佢客人屋企AB比較過,如果播某類音樂(例如鋼琴或者Jazz),一個set得非常好嘅highest end黑膠唱盤並不能完全鸁到佢⋯
    https://www.hiendy.com/hififorum/for...read&tid=94336
    朋友用緊dcs四季,佢上大草到聽完,話四季都要輸,無法!
    輸得好明顯?差什麼?
    無問咁詳細,我讚佢套dcs時頂班時,佢衝口而出,話有套機巳贏左四季,問佢邊套,佢話就係上大草到聽完那套AN。
    https://www.whatsbestforum.com/threa...2/#post-228448
    Only contenders to the Kalliope in my opinion would be the full 4 box DCS rig which I have only heard in show conditions and costs over 100k and the Audio Note Fifth Element which I have not heard but from reports I have read is also an amazing digital product that redefines what can be done with digital.
    https://www.whatsbestforum.com/threa...8/#post-384040
    If you have a old chip does not mean that the DAC is bad. The best DAC I ever heard work with 44 KHz use a old AD1865N with 18 Bit.

    Which one? A AudioNote Fifth Element. Forget your GG or very other DAC.
    https://www.whatsbestforum.com/threa...-4#post-295913
    One of the best I ever heard was the AudioNote Fifth Element DAC.

    I never heard the Fith Element as a Stand Alone DAC. So I don´t know how it sound. I heard a complete Level 5/6 Chain from AN.

    Very close to Live Music. You listen only to the music, not to bass not to middle not to highs. I can only tell you that the DAC has the same Quality as the AN TT3 with IO Ltd Cartridge.
    https://www.whatsbestforum.com/threa...-3#post-318118
    I have the 5th Element in my system with the CDT Six, this kit offer the most relaxing and involved Red Book I've ever heard. It's like playing records. I am getting zero digital hardness.

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  9. #275
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    預設

    Win10原生uac2 driver其實我評價很高,至少贏過 xmos官方asio模式,但如果他們只是針對TAS做支援,那就殘念了,我本來以為可以套用在一般win10環境。

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  11. #276
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    引用 作者: seeteeyou 查看文章
    Linux 比 Windows 佔優的地方還有 Netmap 和 Audio over Ether 這種獨特的好處:
    何にしてもかってない程納得の音。重心の低さと厚みの上に優雅で繊細な弦が乱舞する。広がりを維持しつつその震えが分かるほどに煌めく金管の咆哮。空気を切り裂いて凛と沁み通っていくトライアングル。演奏空間の透徹さ自然さは比類が無い。


    大言壮語なのか気の迷いか、錯覚か。茫洋としてその答えは定かではない。だが、ここで聴ける音楽は幻ではなく現実でもある。オーディオファイルとして待ち望んだ見果てぬ夢のほんの僅かな一瞬なのかもしれないが、、
    http://www.ne.jp/asahi/gonzaemon/audio/diary51-04.html
    (小弟的日語能力有限,如果 tetsuka 兄能夠解釋一下文章的大意就好了,謝謝。)
    因為seeteeyou兄提供的連結中的文字量太大了,所以小弟擷取重點簡單的解釋一下文章內容。

    文章作者說在數位音樂播放對聲音影響的變數實在太多了,不管是硬體或是軟體都有各式各樣太多的選擇讓人無所適從。
    到最後還是只能靠自己慢慢嘗試累積經驗,找出適合自己的聲音喜好和音響器材特性的數位播放用的軟硬體。
    而現在他感覺到似乎從濃霧中露出了一道曙光,雖然還無法判斷是否為究極解答但是算是找到了目標。

    就是長年研究樹莓派的Symphonic-MPD最近推出支援AoE beta11的版本搭配樹莓派4,然後AoE的發信端並不是樹莓派4
    而是使用AMD CPU的PC安裝lightMPD X86_64_upnpgw_aoe(donuts_shop73)。目前AMD PC+樹莓派4的Aoe組合
    方案他覺得是絕佳的搭配,發出了令人難以置信的美妙聲音。

    重心の低さと厚みの上に優雅で繊細な弦が乱舞する。(有著穩定厚重的低音卻又優雅而纖細的弦樂器飛舞著)
    広がりを維持しつつその震えが分かるほどに煌めく金管の咆哮。(有著廣大形體又能感受到振動著空氣發著光芒銅管的咆嘯)
    空気を切り裂いて凛と沁み通っていくトライアングル。(撕裂著空氣般凜然滲透內心的三角鐵)
    演奏空間の透徹さ自然さは比類が無い。(演奏空間的透明感和自然簡直無與倫比)

    大言壮語なのか気の迷いか、錯覚か。茫洋としてその答えは定かではない。(究竟是大言不慚或是一時的迷惘或錯覺,有點茫然無法得出解答)
    だが、ここで聴ける音楽は幻ではなく現実でもある。(但是,在這裡聽到的音樂並不是幻想而是現實存在著)

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  13. #277
    註冊日期
    2014-08-02
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    感謝 tetsuka 兄的回覆,看來日本網友的文采真不錯。

    另外小弟給 Higuma 兄的回覆已搬到另一邊了,謝謝:

    https://www.my-hiend.com/vbb/showthr...373#post243373



    Qualcomm Acquires NUVIA For $1.4 Billion To Take Apple, Intel And AMD Head-On
    https://www.forbes.com/sites/davealt...nd-amd-head-on

    Upcoming ARM Chip That's Faster Than Apple Silicon M1
    https://singhkays.com/blog/arm-cpu-f...than-apple-m1/

    How We Ported Linux to the M1
    https://corellium.com/blog/linux-m1


    單核速度超快的 Apple M1 也可以跑 Ubuntu 了,但是跑 ARM64 版的 piCorePlayer 該是比較困難吧?



    另外把 RPi4 的 BCM2711 超頻到 2.205GHz 的時候好像是聲音會更好,如果這電競手機的 Snapdragon 865 Plus 能夠跑 Linux 的話也許會很棒?

    Snapdragon 865 Plus Can Reach 3.40GHz on Its Prime Core, up From 3.10GHz While Running Very Cool in the ROG Phone 3
    https://wccftech.com/snapdragon-865-...n-rog-phone-3/

    How to Root Asus ROG Phone 3 in 5 Minutes
    https://magiskupdate.com/root-asus-rog-phone-3/

    How to Root Asus ROG Phone 3 with Magisk (Updated Guide)
    https://magiskapp.com/root-asus-rog-...3-with-magisk/

    這個 RB5 開發板的 QRB5165(工業版 Snapdragon 865)主核速度只是比 Plus 版本慢一點,而且 RB5 跑 Kernel 5.10 的 Ubuntu 也沒有問題:

    https://www.thundercomm.com/app_en/p...90131656070623
    https://releases.linaro.org/96boards...mbedded/20.12/
    https://releases.linaro.org/96boards...8133815-v2.zip

    Kernel 5.10:

    https://git.yoctoproject.org/cgit/cgit.cgi/meta-qcom
    https://github.com/ndechesne/meta-qcom
    https://github.com/96boards/meta-rpb

    Xenomai 這邊的 Kernel 5.4 Device Tree Source 找不到 SD865 的 part number SM8250:

    https://gitlab.denx.de/Xenomai/ipipe.../boot/dts/qcom

    大概是把比較新的 SM8250 搬到 Kernel 5.10 的 EVL 了:

    https://git.evlproject.org/linux-evl...m?h=evl/master
    https://www.symphonic-mpd.com/forum/post/1042
    RPi4版は、Xenomaiの後継ソフトであるEVLを採用することにしました。

    https://evlproject.org/

    Xenomaiのメンテナの1人であるPhilippe Gerumさんが開発を進めているソフトです。
    PhilippeさんはXenomaiのarm/arm64向けパッチの大半をコミットしてきた方で、メーリングリストで"今後はEVLに注力する"と発言されてらっしゃいました。



    XenomaiカーネルではPi4でUSB利用時にハングアップする現象を回避することができませんでしたが、EVLではカーネルにパッチを当てることでUSBも動作するようになりました。(あくまで応急処置に過ぎず、安定動作とまではいきませんが、、、外付けSSDが実用レベルになりましたので開発が捗ります)

    年末年始に、aplay-rt/rtalsa/xsinkをEVLに移植する作業に取り掛かりたいと思います。



    RPi4版のスペックは

    • Linuxカーネル 5.x系を採用
    • リアルタイムカーネルにEVLを採用
    • カーネル/アプリケーションは全て64bitでビルド
    • RPi4専用のビルドオプションを使用
    • コンパイラにgcc9.2 (またはgcc10)を採用
    • EVL向けにデバイスドライバを新規開発

    となりそうです。
    https://gitlab.denx.de/Xenomai/xenomai/-/wikis/home
    We are also paving the way to Xenomai 4, which is going to be based on the next generation real-time core developed by the EVL project, with the intent to preserve the user investment in Xenomai 3.x. To this end, the specification process of a Common Xenomai Platform has started. By this process, we define a set of common features and interfaces future Xenomai releases will share, starting from Xenomai 3.3.
    https://xenomai.org/pipermail/xenoma...er/043931.html
    Xenomai 3.x and earlier have long promoted the RTDM interface for implementing drivers, which encourages a separated driver model by design. Instead, the EVL core which is going to be the cornerstone of Xenomai 4 promotes an integrated approach to developing real-time drivers when possible, by adding so-called "out of band" capabilities directly to the implementation of existing mainline drivers [1][2]. A custom EVL driver which has no counterpart in the mainline kernel tree is still a regular character device driver, although it must use the real-time services brought by the EVL core for its time-critical operations [3].


    或許寬溫的工業版比較佔優?

    https://www.androidauthority.com/qua...world-1129615/
    The Robotics RB5 uses the QRB5165 processor with the same CPU, GPU, ISP, and DSP as the Snapdragon 865, but this time with support for industrial-grade temperate ranges from -40°C to 105°C, plus some nice enhancements around computer vision.
    畢竟 JPLAY 的作者 Marcin 兄也是選擇寬溫的工業版 CF/RAM/SSD,聲音會比較好?

    http://jplay.eu/forum/index.php?/top...-81#entry41546
    - 2x4GB Apacer ECC DDR4 UDIMM RAM - industrial grade, extended temp. range (-40 - +85)
    - OCXO CF-SATA adapter /w 32GB Apacer SLC CF card for OS - industrial grade, extended temp. range (-40 - +85)
    http://jplay.eu/forum/index.php?/top...to/#entry52374
    2x 4GB ECC RAM Apacer DDR4 ECC UDIMM (industrial extended temp. range RAM)
    Apacer SLC SSD for OS (industrial extended temp. range) 64GB
    APRO pSLC SSD for music (industrial extended temp. range)
    http://jplay.eu/forum/index.php?/top...e-2#entry49239
    Just arrived and installed in my PC: https://industrial.apacer.com/en-ww/...emp.-ECC-UDIMM

    It replaces the previous generation of Apacer (75.B93H0.G000B). Amazing improvement over the predecessor
    另一高手 Nenon 兄:

    https://audiophilestyle.com/forums/t...omment-1005952
    My guess is that the component quality matters as well as the execution, quality of service, etc. Apacer is doing a good job with their industrial wide range temperature RAM, and it is a no brainer to me.
    RPi4 的 RAM 則全屬 Wireless Temperature:

    https://www.raspberrypi.org/forums/v...c.php?t=277251
    代碼:
    2GiB date: 9LD77 part#: D9WHZ
    4GiB date: 9FD77 part#: D9WHV
    8GiB date: OAA47 part#: D9ZCL
    https://www.micron.com/support/tools...=D9WHZ#pnlFBGA
    MT53D512M32D2DS-053 WT:D
    https://www.micron.com/support/tools...=D9WHV#pnlFBGA
    MT53D1024M32D4DT-053 WT:D
    https://www.micron.com/support/tools...=D9ZCL#pnlFBGA
    MT53E2G32D4NQ-046 WT:A
    https://www.micron.com/-/media/clien...de/numdram.pdf
    WT = Wireless temperature
    XT = Wide temperature
    https://media.digikey.com/PDF/Data%2...5W8MW16BGX.pdf
    – Wireless (–30°C to +85°C) WT
    – Industrial (–40°C to +85°C) IT

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  15. #278
    註冊日期
    2014-08-02
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    引用 作者: sam0402 查看文章
    我看到另一套,有興趣的試試看。https://gentooplayer.com/
    可以ssh 就有機會換kernel及最佳化
    https://github.com/sam0402/pcp-44.1KHz/watchershttps://github.com/antonellocaroli/G...master/news.sh
    TEST: Timer kernel patch"
    https://gentooplayer.com/news
    01/02/21 NEW IMAGES V. 5.00

    -in kernel update/switching there are some test kernels for Rpi3 and Rpi4, soon for x86 PCs. I would like some feedback on these kernels.
    https://melius.club/topic/302069-gen...omment-7162642
    Oltre alla versioni solite (standard e RT) ci saranno anche altre due serie di versioni denominate TEST, che includono alcune patch al kernel indicate sul forum di CA, per quando riguarda il timer del kernel...
    https://github.com/sam0402/pcp-44.1K...aster/xenomai3

    Poi magari qualcuno mi fará sapere se ci sono differenze.
    好像沒有給 sam0402 兄任何 credits 啊,他的 Kernel 5.4 分為兩個版本:

    https://github.com/antonellocaroli/G.../5.4.83-210121
    https://github.com/antonellocaroli/G...-210121.tar.xz
    https://github.com/antonellocaroli/G...-210121.tar.gz

    https://github.com/antonellocaroli/G...4.83-210121-RT
    https://github.com/antonellocaroli/G...0121-RT.tar.xz
    https://github.com/antonellocaroli/G...0121-RT.tar.gz

    這些是 TEST 版本:

    https://github.com/antonellocaroli/G...83-210121-TEST
    https://github.com/antonellocaroli/G...21-TEST.tar.xz
    https://github.com/antonellocaroli/G...21-TEST.tar.gz

    https://github.com/antonellocaroli/G...210121-RT-TEST
    https://github.com/antonellocaroli/G...RT-TEST.tar.xz
    https://github.com/antonellocaroli/G...RT-TEST.tar.gz



    另外 DigiPi 真的相當有趣,看來 FifoPi 並非必要了?

    http://www.stsd99.com/phpBB3/viewtop...p=19465#p19465
    http://www.headphoneclub.com/thread-740233-1-1.html
    https://item.taobao.com/item.htm?id=629041455828

    同一賣家還有兩款 USB 光隔離處理器:

    http://www.headphoneclub.com/thread-742346-1-1.html
    非常成功的一個小產品,基本是壓倒性好評,2020年完美落幕
    關於PCHIFI的各種優化手段,爭議是持續的,但值得慶幸的是,會有更多的玩家得益於我們的技術進步
    祝大家玩的開心
    https://item.taobao.com/item.htm?id=636388022226
    https://item.taobao.com/item.htm?id=637015014400

    SFP 方面可以參考殿堂級 SGM Extreme 的建議:

    https://taikoaudio.com/taiko-2020/faq/
    Most of the Extreme owners use this:

    Shopping list:
    1 x Startech ET91000SFP2 Fiber Media Converter
    2 x Finisar FTLF1324P2BTL-MC SFP modules
    1 x Fiber cable at needed length, 9/125 OS2 low loss quality, LC connectors on both sides
    https://www.whatsbestforum.com/threa...23#post-650478
    However some friends and I in Hong Kong recently prefer the following Finisar and have already replaced all our transievers with it.
    https://www.whatsbestforum.com/threa...02#post-652287
    I agree with Ray and Steve on the Finisar SFPs. The purity that comes through with these is something to behold. They revealed a coloration in the Planet Tech SFPs that was most evident in sibilance. Big thanks to CK for the recommendation.
    https://detail.1688.com/offer/534646344847.html
    https://item.taobao.com/item.htm?id=35238177629
    https://item.taobao.com/item.htm?id=547319691947
    https://item.taobao.com/item.htm?id=573367408440
    https://item.taobao.com/item.htm?id=635306151943
    https://www.aliexpress.com/item/32691935325.html
    https://www.alibaba.com/product-deta...474237265.html
    https://www.alibaba.com/product-deta...356831570.html
    https://www.alibaba.com/product-deta...618660365.html
    https://www.alibaba.com/product-deta...094750751.html
    https://www.alibaba.com/product-deta...167455999.html
    https://www.ebay.com/itm/Finisar-SFP...e/232253494537

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  17. #279
    註冊日期
    2014-08-02
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    soundcheck's piCorePlayer Toolbox 1.0
    https://github.com/klslz/pcptoolbox
    NOTE: NOT YET READY FOR USE. IM STILL TESTING
    https://github.com/klslz/pcptoolbox/...in/pCPt-tweaks
    代碼:
    env_set
    check_pcp
    license
    set_sl_affinity
    stop_idlenet
    stop_procs
    clear_cache
    log_stat
    那個 stop_idlenet 看來挺有趣,當有線和無線網絡閒置的時候就用 ifconfig 把他們暫時關掉?



    CPAN step-up to 8.2 ? #82
    https://github.com/Logitech/slimserver-vendor/issues/82
    Since LMS is on 8.2 now, would be nice to step up CPAN accordingly.
    https://github.com/Logitech/slimserv...hangelog8.html
    Add Perl 5.32 and 5.30 support for Linux aarch64 platform. (thanks clivem!)
    https://github.com/Logitech/slimserv...ead-multi/auto
    Add Perl 5.32 support for armv7/aarch64, to be used with Debian 11 in the Docker image.
    假如 soundcheck 兄能夠像 Squeezelite 那樣把 LMS 優化的話就太棒了,哈哈。



    [Dovetail] x86 test version available (kernel v5.10)
    https://xenomai.org/pipermail/xenoma...ry/044245.html
    Quick update on the 5.4 ipipe for arm/arm64. Both are ready to be beta tested. Each repo has anipipe/5.4.y branch that has been tested with Xenomai next. I'll be doing a beta release for both arm and arm64 ipipe shortly, but if anyone is waiting to get started please use the repo branches mentioned above.
    arm/arm64 ipipe 5.4
    https://xenomai.org/pipermail/xenoma...ry/044257.html
    The initial port of the Cobalt core to Dovetail/x86 is available from [1]. Ports to Dovetail/ARM and Dovetail/arm64 should follow within a couple of weeks.

    So far, latency and switchtest run flawlessly. Most of the smokey test suite passes successfully, except the GDB test at the moment.

    How to test this:

    - clone Xenomai from [1], switch to branch for-upstream/dovetail
    - clone the Dovetail tree (v5.10) from [2], switch to branch dovetail/master
    - run scripts/prepare-kernel.sh available from [1] into [2] (usual procedure) for x86, that would be: .../scripts/prepare-kernel.sh --arch=x86
    - build your kernel using the sources from [2]

    There is no user-visible Kconfig change compared to an I-pipe based version.

    Alternatively, the Xenomai code base in [1] can also run on top of the I-pipe. prepare-kernel.sh detects which pipeline flavour is there, and prepares the source tree accordingly.

    This code is being gradually merged into Xenomai's -next branch, and will be at the core of Xenomai 3.2. Testing and feedback appreciated.

    Thanks,

    [1] https://lab.xenomai.org/xenomai-rpm.git, "for-upstream/dovetail" branch
    [2] https://git.evlproject.org/linux-evl.git, "dovetail/master" branch
    Kernel 5 版本的 ipipe-arm64 也差不多了,屆時就可以試試 USB 聲卡的 alsaloop 是否比較穩定。

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  19. #280
    註冊日期
    2011-06-29
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    分享一段擷取自TIDAL上蔡琴的(遇見)專輯的(把悲傷留給自己)
    播放設備:

    1. RPi 4B /1G
    2. IAN CANADA FIFOPI Q3
    3. ES9038Q2M DAC Hat
    4. HDMIpi Transmitter FifoPi

    播放軟體:pCP7.0 Soundcheck’sEngine 4
    錄音設備:SonyD50 (44.1K wav)
    https://drive.google.com/file/d/1_id...ew?usp=sharing

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